Leopold Hofmann
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genre: classical-era
description: thumb|Leopold Hofmann, was an Austrian composer of classical music.|341x341px Leopold Hofmann (also Ludwig Hoffman, Leopold Hoffman, Leopold Hoffmann; 14 August 1738 – 17 March 1793) was an Austrian c
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followers: 1146
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album: Hofmann: Flute Concertos, Vol. 3
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  date published: 2019-08-09
  track: Flute Concerto in A Major, Badley A1: III. Allegro
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    by artist: Uwe Grodd
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      date published: 2019-08-09
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    subject of: OpenTimestamps Proof of Existence
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      date published: 2026-07-06T06:56:49Z
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album: Six Divertimenti Op. 1
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  date published: 2023-03-17
album: Hofmann: Concerti per Flauto e Orchestra
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  date published: 2013-11-01
album: Hofmann, L.: Oboe Concertos / Concertos for Oboe and Harpsichord
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  date published: 2002-09-12
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    subject of: OpenTimestamps Proof of Existence
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      date published: 2026-07-30T17:41:38Z
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album: Hofmann: Flute Concertos, Vol. 2
album: Hofmann: Flute Concertos, Vol. 1
album: Hofmann: Violin Concertos
album: Hofmann: Cello Concertos
album: Hofmann: Five Symphonies
album: Hofmann: Flute Concerto in D Major
album: Hofmann: Concerto pour flûte (Formerly Attributed to Joseph Haydn as Hob. VIIf:D1, Mono Version)
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Hofmann: Flute Concertos, Vol. 2
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date published: 2001-09-10
track: Flute Concerto in D Major, Badley D4: II. Andante ma non molto
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    date published: 2026-07-30T15:42:38Z
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Hofmann: Flute Concertos, Vol. 1
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date published: 2001-07-01
track: Flute Concerto in D Major, Badley D6: II. Adagio
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  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-07-08T03:20:19Z
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Hofmann: Violin Concertos
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date published: 1998-09-25

Hofmann: Cello Concertos
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date published: 1998-03-19
track: Cello Concerto in D Major, Badley D3: I. Allegro moderato
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  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-07-31T03:15:04Z
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  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-07-08T03:20:19Z
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  by artist: Tim Hugh
  by artist: Royal Northern Sinfonia
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  subject of: OpenTimestamps Proof of Existence
  audio: Cello Concerto in C Major, Badley C3: II. Adagio
track: Cello Concerto in C Major, Badley C3: III. Vivace
track: Cello Concerto in D Major, Badley D1: II. Andante ma non molto
track: Cello Concerto in D Major, Badley D1: III. Vivace
track: Cello Concerto in C Major, Badley C1: I. Tempo giusto
track: Cello Concerto in C Major, Badley C1: II. Adagio ma non molto

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OTSVerificationAPI
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OTSTimestamp
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OTSVerifyInstructions
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value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch

OpenTimestamps Proof of Existence
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date published: 2026-07-08T03:20:19Z

Cello Concerto in C Major, Badley C3: II. Adagio
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Cello Concerto in C Major, Badley C3: III. Vivace
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by artist: Leopold Hofmann
by artist: Tim Hugh
by artist: Royal Northern Sinfonia
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additional property: OTSTimestamp
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:53:27Z
audio: Cello Concerto in C Major, Badley C3: III. Vivace
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Cello Concerto in D Major, Badley D1: II. Andante ma non molto
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by artist: Tim Hugh
by artist: Royal Northern Sinfonia
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genre: classical-era
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additional property: OTSVerificationAPI
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additional property: OTSTimestamp
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additional property: OTSVerifyInstructions
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  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:20:19Z
audio: Cello Concerto in D Major, Badley D1: II. Andante ma non molto
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Cello Concerto in D Major, Badley D1: III. Vivace
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by artist: Leopold Hofmann
by artist: Tim Hugh
by artist: Royal Northern Sinfonia
in album: Hofmann: Cello Concertos
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genre: classical-era
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additional property: OTSVerificationAPI
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:22:41Z
audio: Cello Concerto in D Major, Badley D1: III. Vivace
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Cello Concerto in C Major, Badley C1: I. Tempo giusto
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by artist: Tim Hugh
by artist: Royal Northern Sinfonia
in album: Hofmann: Cello Concertos
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genre: classical-era
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-31T17:29:52Z
audio: Cello Concerto in C Major, Badley C1: I. Tempo giusto
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Cello Concerto in C Major, Badley C1: II. Adagio ma non molto
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by artist: Tim Hugh
by artist: Royal Northern Sinfonia
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genre: classical-era
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-08-01T01:44:32Z
audio: Cello Concerto in C Major, Badley C1: II. Adagio ma non molto
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Hofmann: Concerto pour flûte (Formerly Attributed to Joseph Haydn as Hob. VIIf:D1, Mono Version)
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Cello Concerto in D Major, Badley D3: III. Allegro molto
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